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EBPR系统中微生物群落结构及其除磷效能分析.docx

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EBPR系统中微生物群落结构及其除磷效能分析 Introduction EnhancedBiologicalPhosphorusRemoval(EBPR)isacriticalprocessfortheremovalofphosphorusfromwastewater.Thisprocessreliesontheactivityofadiversegroupofmicroorganismsthataccumulateandstorephosphorusintheformofpolyphosphate.ThekeytosuccessfulEBPRistheabilityofthesemicroorganismstoeffectivelyremovephosphoruswhilemaintainingastablemicrobialcommunitystructure.Therefore,understandingthemicrobialcommunitystructureinEBPRsystemsanditsroleintheremovalofphosphorusisvitalfortheoptimizationofthisprocess. MicrobialCommunityStructureinEBPRsystems ThemicrobialcommunitystructureinEBPRsystemsiscomplexandcomposedofadiversegroupofmicroorganisms.ThekeyplayersinthisprocessareAcinetobacter,CandidatusAccumulibacter,andTetrasphaera.CandidatusAccumulibacter,inparticular,hasbeenextensivelystudiedduetoitsabilitytoefficientlyremovephosphorusfromwastewater.Thisbacteriumisapolyphosphate-accumulatingorganism(PAO)thatisabletoaccumulateupto20%ofitscellmassaspolyphosphate. OthermicroorganismspresentinEBPRsystemsincludeFerribacterium,Defluviitoga,andBurkholderiales.TheexactrolesofthesemicroorganismsinEBPRsystemsarenotwellunderstood,buttheyarebelievedtoplayimportantrolesinthedegradationoforganicmatterandtheremovalofphosphorus. ThemicrobialcommunitystructureinEBPRsystemscanbeinfluencedbyavarietyoffactors,includingthepH,temperature,andnutrientavailability.Forexample,adecreaseinthepHcanfavorthegrowthofAcinetobacter,whileCandidatusAccumulibacterprefersahigherpH.Thetemperaturealsoplaysanimportantroleinthemicrobialcommunitystructure,withdifferentmicroorganismsthrivingatdifferenttemperatures. Overall,themicrobialcommunitystructureinEBPRsystemsiscomplexandhighlydynamic,withdifferentmicroorganismsplayingcrucialrolesintheremovalofphosphorus. PhosphorusRemovalEfficiencyandMicrobialCommunityStructure TheefficiencyofphosphorusremovalinEBPRsystemsisdirectlylinkedtothemicrobialcommunitystructure.Inparticular,theabundanceandactivityofCandidatusAccumulibacterhavebeenshowntobepositivelycor